Salish Sea Marine Survival Project researchers inserted acoustic tracking tags in steelhead to assess their outmigration success through the Strait of Georgia to the Pacific Ocean. They also took non-lethal gill biopsies from each fish prior to outmigration. Their analyses revealed that gene expression profiles related to outmigrating smolt mortality: differential elevation of gene expression in genes associated with the immune system and osmoregulation was linked to outmigrant fate. Read more: Healy et al. (2018) Transcriptome profiles relate to migration fate in hatchery Steelhead (Oncorhynchus mykiss) smolts. DOI: 10.1139/cjfas-2017-0424